#include <iostream>
using std::cout;
using std::endl;

namespace wd
{
int num = 10;

void print(){
    cout << "wd::print()" << endl;
}
}//end of namespace wd


namespace wd2
{
int num = 100;

void print(){
    cout << "wd2::print()" << endl;
}
}//end of namespace wd2

void test0(){
    cout << wd::num << endl;
    cout << wd2::num << endl;
    wd::print();
    wd2::print();
}

int main(void){
    test0();
    return 0;
}
